81473954366592 has 192 divisors, whose sum is σ = 250560970077600. Its totient is φ = 25321572851712.

The previous prime is 81473954366417. The next prime is 81473954366663. The reversal of 81473954366592 is 29566345937418.

81473954366592 is a `hidden beast` number, since 8 + 1 + 4 + 73 + 9 + 543 + 6 + 6 + 5 + 9 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 81473954366592.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17344842 + ... + 21535817.

Almost surely, 2^{81473954366592} is an apocalyptic number.

It is an amenable number.

81473954366592 is an abundant number, since it is smaller than the sum of its proper divisors (169087015711008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81473954366592 is a wasteful number, since it uses less digits than its factorization.

81473954366592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38880803 (or 38880788 counting only the distinct ones).

The product of its digits is 1175731200, while the sum is 72.

The spelling of 81473954366592 in words is "eighty-one trillion, four hundred seventy-three billion, nine hundred fifty-four million, three hundred sixty-six thousand, five hundred ninety-two".